X^2-40=39X

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Solution for X^2-40=39X equation:


Simplifying
X2 + -40 = 39X

Reorder the terms:
-40 + X2 = 39X

Solving
-40 + X2 = 39X

Solving for variable 'X'.

Reorder the terms:
-40 + -39X + X2 = 39X + -39X

Combine like terms: 39X + -39X = 0
-40 + -39X + X2 = 0

Factor a trinomial.
(-1 + -1X)(40 + -1X) = 0

Subproblem 1

Set the factor '(-1 + -1X)' equal to zero and attempt to solve: Simplifying -1 + -1X = 0 Solving -1 + -1X = 0 Move all terms containing X to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + -1X = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -1X = 0 + 1 -1X = 0 + 1 Combine like terms: 0 + 1 = 1 -1X = 1 Divide each side by '-1'. X = -1 Simplifying X = -1

Subproblem 2

Set the factor '(40 + -1X)' equal to zero and attempt to solve: Simplifying 40 + -1X = 0 Solving 40 + -1X = 0 Move all terms containing X to the left, all other terms to the right. Add '-40' to each side of the equation. 40 + -40 + -1X = 0 + -40 Combine like terms: 40 + -40 = 0 0 + -1X = 0 + -40 -1X = 0 + -40 Combine like terms: 0 + -40 = -40 -1X = -40 Divide each side by '-1'. X = 40 Simplifying X = 40

Solution

X = {-1, 40}

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